I have a strange issue with an email address changing when replying to emails in a conversation from a specific person,
for example the user is joe.bloggs@domain.com we have a number of emails in a conversation,
If I reply to one of the emails in the middle of the conversation the email address changes to joe.blogzs@domin.com and I get an NDR.
I cant think of what would cause an address to change on a reply can anyone else?
this only affects email to joe bloggs
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